{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP3981IMMX-2.5/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP3981IMMX-2.5-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP3981IMMX-2.5-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP3981IMMX-2.5%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP3981IMMX-2.5/NOPB linear regulator, 300mA output, 2.5V fixed, 0.2V dropout, 8-VSSOP package, -40°C to 125°C.","salesMarkdown":"## 300 mA LDO with 0.2 V dropout and 50 dB PSRR The LP3981IMMX-2.5/NOPB is a fixed 2.5 V output linear regulator from Texas Instruments, delivering up to 300 mA. Power-supply rejection ratio (PSRR) is 50 dB to 55 dB from 1 kHz to 10 kHz, which attenuates switching-converter ripple by a factor of 300–560×. For a 10 mVpp ripple at 1 kHz, the output sees roughly 18 µVpp — clean enough for sensitive analog front-ends. ## Industrial temperature range and protection suite The -40°C to 125°C operating temperature range covers automotive under-hood and industrial enclosure environments without derating. Over-current, over-temperature, and short-circuit protection are built in — the regulator survives a sustained output short without damage. Quiescent current is 120 µA typical, rising to 210 µA maximum under full load. The enable pin lets the system shut down the regulator to near-zero draw when the load is idle — useful for battery-powered designs that sleep between active cycles. ## Package and supply-chain fit ROHS3 compliant per.","metaTitle":"LP3981IMMX-2.5/NOPB LDO, 300mA, 2.5V Fixed, 8-VSSOP","metaDescription":"Texas Instruments LP3981IMMX-2.5/NOPB linear regulator, 300mA output, 0.2V dropout, PSRR 50-55dB, -40 to 125°C, active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"PSRR":"50dB ~ 55dB (1kHz ~ 10kHz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"8-TSSOP, 8-MSOP (0.118\\\", 3.00mm Width)","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"300mA","Protection Features":"Over Current, Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C","Voltage - Input (Max)":"6V","Voltage Dropout (Max)":"0.2V @ 300mA","Current - Supply (Max)":"210 µA","Supplier Device Package":"8-VSSOP","Current - Quiescent (Iq)":"120 µA","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.85","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.85000","currency":"USD"},{"qty":10,"price":"$0.74500","currency":"USD"},{"qty":25,"price":"$0.70000","currency":"USD"},{"qty":100,"price":"$0.57120","currency":"USD"},{"qty":250,"price":"$0.53060","currency":"USD"},{"qty":500,"price":"$0.45156","currency":"USD"},{"qty":1000,"price":"$0.36125","currency":"USD"},{"qty":3500,"price":"$0.32738","currency":"USD"},{"qty":7000,"price":"$0.31950","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1c6d57dcd07d7153ec1284236bf58793.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the PSRR of LP3981IMMX-2.5/NOPB?","answer":"The PSRR is 50 dB to 55 dB from 1 kHz to 10 kHz. This means ripple from a 1 kHz switching regulator is attenuated by a factor of roughly 300×, keeping the output clean for analog loads."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP3981IMMX-2.5-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LP3981IMMX-2.5-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}